TAHIR, Ade Putra; GUNAWAN, Suwardi; PAWITRA, Theresia Amelia. Analysis productivity of the mine facility department using the objective matrix method (OMAX): case study in coal mining company. Operations Excellence: Journal of Applied Industrial Engineering, Jakarta, Indonesia, v. 15, n. 3, p. 263–273, 2024. DOI: 10.22441/oe.2023.v15.i3.092. Disponível em: https://publikasi.mercubuana.ac.id/index.php/oe/article/view/23400. Acesso em: 4 jun. 2026.